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Protein

Methyl-accepting chemotaxis protein I

Gene

tsr

Organism
Escherichia coli (strain K12)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at protein leveli

Functioni

Receptor for the attractant L-serine and related amino acids. Is also responsible for chemotaxis away from a wide range of repellents, including leucine, indole, and weak acids.
Chemotactic-signal transducers respond to changes in the concentration of attractants and repellents in the environment, transduce a signal from the outside to the inside of the cell, and facilitate sensory adaptation through the variation of the level of methylation. Attractants increase the level of methylation while repellents decrease the level of methylation, the methyl groups are added by the methyltransferase CheR and removed by the methylesterase CheB.

GO - Molecular functioni

  • protein histidine kinase binding Source: EcoCyc
  • protein homodimerization activity Source: CAFA
  • transmembrane signaling receptor activity Source: EcoCyc

GO - Biological processi

  • cell motility Source: CACAO
  • cellular response to amino acid stimulus Source: CAFA
  • chemotaxis Source: CACAO
  • detection of chemical stimulus Source: CAFA
  • protein homooligomerization Source: CAFA
  • receptor clustering Source: CAFA
  • regulation of bacterial-type flagellum-dependent cell motility Source: CAFA
  • regulation of chemotaxis Source: CAFA
  • regulation of protein histidine kinase activity Source: CAFA
  • response to amino acid Source: EcoCyc
  • signal complex assembly Source: CAFA
  • signal transduction Source: CACAO

Keywordsi

Molecular functionTransducer
Biological processChemotaxis

Enzyme and pathway databases

BioCyciEcoCyc:TSR-MONOMER.

Names & Taxonomyi

Protein namesi
Recommended name:
Methyl-accepting chemotaxis protein I
Short name:
MCP-I
Alternative name(s):
Serine chemoreceptor protein
Gene namesi
Name:tsr
Synonyms:cheD
Ordered Locus Names:b4355, JW4318
OrganismiEscherichia coli (strain K12)
Taxonomic identifieri83333 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaGammaproteobacteriaEnterobacteralesEnterobacteriaceaeEscherichia
Proteomesi
  • UP000000318 Componenti: Chromosome
  • UP000000625 Componenti: Chromosome

Organism-specific databases

EcoGeneiEG11034. tsr.

Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Topological domaini1 – 6CytoplasmicSequence analysis6
Transmembranei7 – 30HelicalSequence analysisAdd BLAST24
Topological domaini31 – 190PeriplasmicSequence analysisAdd BLAST160
Transmembranei191 – 210HelicalSequence analysisAdd BLAST20
Topological domaini211 – 551CytoplasmicSequence analysisAdd BLAST341

GO - Cellular componenti

  • integral component of plasma membrane Source: EcoCyc
  • methyl accepting chemotaxis protein complex Source: CAFA
  • plasma membrane Source: EcoCyc

Keywords - Cellular componenti

Cell inner membrane, Cell membrane, Membrane

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001105371 – 551Methyl-accepting chemotaxis protein IAdd BLAST551

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei297Glutamate methyl ester (Gln)2 Publications1
Modified residuei304Glutamate methyl ester (Glu)2 Publications1
Modified residuei311Glutamate methyl ester (Gln)2 Publications1
Modified residuei493Glutamate methyl ester (Glu)2 Publications1
Modified residuei502Glutamate methyl ester (Glu)1 Publication1

Keywords - PTMi

Methylation

Proteomic databases

PaxDbiP02942.
PRIDEiP02942.

Interactioni

GO - Molecular functioni

  • protein histidine kinase binding Source: EcoCyc
  • protein homodimerization activity Source: CAFA

Protein-protein interaction databases

BioGridi4261744. 200 interactors.
DIPiDIP-11046N.
IntActiP02942. 4 interactors.
MINTiMINT-1306492.
STRINGi316407.85677095.

Structurei

Secondary structure

1551
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Helixi25 – 78Combined sources54
Helixi87 – 110Combined sources24
Helixi119 – 144Combined sources26
Helixi148 – 153Combined sources6
Helixi156 – 186Combined sources31
Helixi296 – 328Combined sources33
Helixi332 – 360Combined sources29
Helixi362 – 388Combined sources27
Helixi390 – 392Combined sources3
Helixi393 – 438Combined sources46
Helixi441 – 448Combined sources8
Turni449 – 451Combined sources3
Helixi452 – 515Combined sources64

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1QU7X-ray2.60A/B294-520[»]
2D4UX-ray1.95A/B25-190[»]
3ATPX-ray2.50A/B25-190[»]
3ZX6X-ray2.65A/B264-551[»]
ProteinModelPortaliP02942.
SMRiP02942.
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiP02942.

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini216 – 268HAMPPROSITE-ProRule annotationAdd BLAST53
Domaini273 – 502Methyl-accepting transducerPROSITE-ProRule annotationAdd BLAST230

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni64 – 73The 3 Arg may form a positively charged pocket, which binds the alpha-carboxyl group of the attractant AA10

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiENOG4105C8Q. Bacteria.
COG0840. LUCA.
HOGENOMiHOG000148074.
InParanoidiP02942.
KOiK05874.
PhylomeDBiP02942.

Family and domain databases

CDDicd06225. HAMP. 1 hit.
cd00181. Tar_Tsr_LBD. 1 hit.
Gene3Di1.20.120.30. 1 hit.
InterProiView protein in InterPro
IPR004090. Chemotax_Me-accpt_rcpt.
IPR004091. Chemotax_Me-accpt_rcpt_Me-site.
IPR035440. Four_Helix_Bundle_domain.
IPR003660. HAMP_dom.
IPR004089. MCPsignal_dom.
IPR003122. Tar_rcpt_lig-bd.
PfamiView protein in Pfam
PF00672. HAMP. 1 hit.
PF00015. MCPsignal. 1 hit.
PF02203. TarH. 1 hit.
PRINTSiPR00260. CHEMTRNSDUCR.
SMARTiView protein in SMART
SM00304. HAMP. 1 hit.
SM00283. MA. 1 hit.
SM00319. TarH. 1 hit.
SUPFAMiSSF47170. SSF47170. 1 hit.
PROSITEiView protein in PROSITE
PS00538. CHEMOTAXIS_TRANSDUC_1. 1 hit.
PS50111. CHEMOTAXIS_TRANSDUC_2. 1 hit.
PS50885. HAMP. 1 hit.

Sequencei

Sequence statusi: Complete.

P02942-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MLKRIKIVTS LLLVLAVFGL LQLTSGGLFF NALKNDKENF TVLQTIRQQQ
60 70 80 90 100
STLNGSWVAL LQTRNTLNRA GIRYMMDQNN IGSGSTVAEL MESASISLKQ
110 120 130 140 150
AEKNWADYEA LPRDPRQSTA AAAEIKRNYD IYHNALAELI QLLGAGKINE
160 170 180 190 200
FFDQPTQGYQ DGFEKQYVAY MEQNDRLHDI AVSDNNASYS QAMWILVGVM
210 220 230 240 250
IVVLAVIFAV WFGIKASLVA PMNRLIDSIR HIAGGDLVKP IEVDGSNEMG
260 270 280 290 300
QLAESLRHMQ GELMRTVGDV RNGANAIYSG ASEIATGNND LSSRTEQQAA
310 320 330 340 350
SLEETAASME QLTATVKQNA ENARQASHLA LSASETAQRG GKVVDNVVQT
360 370 380 390 400
MRDISTSSQK IADIISVIDG IAFQTNILAL NAAVEAARAG EQGRGFAVVA
410 420 430 440 450
GEVRNLAQRS AQAAREIKSL IEDSVGKVDV GSTLVESAGE TMAEIVSAVT
460 470 480 490 500
RVTDIMGEIA SASDEQSRGI DQVGLAVAEM DRVTQQNAAL VEESAAAAAA
510 520 530 540 550
LEEQASRLTE AVAVFRIQQQ QRETSAVVKT VTPAAPRKMA VADSEENWET

F
Length:551
Mass (Da):59,443
Last modified:July 1, 1993 - v2
Checksum:iE8DB026029989B0F
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
V00373 Genomic DNA. Translation: CAA23676.1. Sequence problems.
U14003 Genomic DNA. Translation: AAA97252.1.
U00096 Genomic DNA. Translation: AAC77311.1.
AP009048 Genomic DNA. Translation: BAE78345.1.
S56952 Genomic DNA. Translation: AAB25802.1.
PIRiE65250. QRECS.
RefSeqiNP_418775.1. NC_000913.3.
WP_000919536.1. NZ_LN832404.1.

Genome annotation databases

EnsemblBacteriaiAAC77311; AAC77311; b4355.
BAE78345; BAE78345; BAE78345.
GeneIDi948884.
KEGGiecj:JW4318.
eco:b4355.
PATRICifig|1411691.4.peg.2331.

Similar proteinsi

Entry informationi

Entry nameiMCP1_ECOLI
AccessioniPrimary (citable) accession number: P02942
Secondary accession number(s): P76817, Q2M5W1
Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 21, 1986
Last sequence update: July 1, 1993
Last modified: August 30, 2017
This is version 171 of the entry and version 2 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

3D-structure, Complete proteome, Direct protein sequencing, Reference proteome

Documents

  1. Escherichia coli
    Escherichia coli (strain K12): entries and cross-references to EcoGene
  2. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references